50 PTS+ BRAINLIEST IF CORRECT (RANDOM ANSWERS WILL BE REPORTED) Please help

An educatethe yuan dynasty was responsible for which of the following: i. improving the road system ii. increasing sea trade with india and south east asia. iii. extending the canal system iv. brutal warfare and ruthless killing of people in order to take over china. a. i & iii c. iv only b. ii only d. all of the above member of the government

9. explain whether the marines on mt. suribachi in 1945 showed respect to the american flag. support your answer with evidence from the text.

What form of government is powers of states? first letter of the answer is r.